Technical data

10
Technical data
General
Type designation.......................................................... 2001 2002 2003
Output
1)
at 53 r/s (3200 rpm) ........................................ 6.6 kW (9.0 hp) 13.2 kW (18.0 hp) 20.6 kW (28.0 hp)
Output
1)
at 53 r/s (3200 rpm) 2003T ............................. 33.1 kW (45.0 hp)
Number of cylinders ..................................................... 1 2 3
Displacement ............................................................... 0.43 dm
3
0.852 dm
3
1.278 dm
3
.................................................................................... (26.2 cu.in) (51.9 cu.in) (77.99 cu.in)
Cylinder bore ................................................................ 79 mm (3.11024 in)
Stroke .......................................................................... 87 mm (3.4252 in)
Compression ratio ........................................................ 17.5:1
Compression ratio at starter motor speed..................... 2 – 2.5 MPa (290 – 362 psi)
Direction of rotation (seen from the front end) .............. Clockwise
Idling speed ................................................................. 13 – 14 r/s (775 – 825 rpm)
Oil pressure at full speed and warm engine .................. 0.35 – 0.40 MPa (50 – 58 psi)
Oil pressure at idling and warm engine ......................... 0.08 – 0.15 MPa (11 – 22 psi)
Cylinder block
Material ........................................................................ Special alloy cast iron
Cylinder diameter, standard.......................................... 79.00 – 79.03 (3.11025 – 3.11142 in.)
0.25 mm over-size ....................................................... 79.25 – 79.28 (3.12008 – 3.12126 in.)
0.50 mm over-size ....................................................... 79.50 – 79.53 (3.12992 – 3.13110 in.)
Pistons
Material ........................................................................ Light-alloy
Total height .................................................................. 78.3 mm (3.08268 in.)
Height from gudgeon pin center to piston top ............... 50.3 mm (1.98031 in.)
Piston clearance in cylinder ......................................... 0.09 mm (.00354 in.)
Piston in standard dimension ....................................... 78.903 – 78.917 mm (3.10642 – 3.10697 in.)
0.25 mm over-size ....................................................... 79.153 – 79.167 mm (3.11626 – 3.11681 in.)
0.50 mm over-size ....................................................... 79.403 – 79.417 mm (3.12610 – 3.12665 in.)
Gudgeon pins
Diameter ...................................................................... 25.995 – 26.000 mm (1.02343 – 1.02362 in.)
Gudgeon pin bushing, diameter .................................... 26.005 – 26.011 mm (1.02382 – 1.02406 in.)
Clearance gudgeon pin – bushing ................................. 0.0050 – 0.0160 mm (0.00020 – 0.0063 in.)
Piston rings
Compression ring, number ........................................... 2
Oil ring, number ........................................................... 1
The upper compression ring has an inlay of chrome.
The piston rings are available for standard dimension and
for 0.25 mm (0.00984 in.) and 0.50 mm (0.01969 in) over-size
Piston ring clearance in the groove
Upper compression ring ............................................... 0.070 – 0.102 mm (0.00276 – 0.00402 in.)
Lower compression ring ............................................... 0.050 – 0.082 mm (0.00197 – 0.00323 in.)
Oil ring ......................................................................... 0.030 – 0.062 mm (0.00118 – 0.00244 in.)
1)
Propeller shaft output in accordance with DIN 6270B.